Pipe and socket holder.



G. W. LA V00.

PIPE AND SOCKET HOLDER.

APPLICATION FILED APR. 12, 1910.

992,887; Patented May 23, 1911.

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fi i M G. W. LA V00.

PIPE AND SOCKET HOLDER.

APPLIOA'IION FILED APR. 12, 1910.

Patented May 23, 1911.

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I mmmmummm GEORGE'W. LA. V00, OF STE UBENVILLE, OHIO.

PIPE AND- socxn'r HOLDER.

' Toull, whom: it may concern.

B'ciit known that I, Gannon Y. LA V00, :1

dlo-itizenuof the United States. residing at .Steubenvillc. in the county of Jefi'erson and State of Ohio, have invented or discovered ncwl-and:'useful Improvements 1n Pipe and 'Socket Holders, of which the following is a 4 .-;pccification.v

Myinvention relates to means for holdlng :tubular articles, such as plpes, and pipe coni, vplings or sockets, and for screwing couplings or sockets on p1 es. 1

.oThciobject my invention is to provide a pipe or couplingholding device or chuck that is self-gr pping and that grips tighter *as the "resistance increases.

Referring to the accompanying drawings, Figure 1 is aside elevation partly broken away of a socket-screwing machine embodying my invention; Fig. 2, an end elevation of the holder or chuck for the socket with a socket. in section; Fig. 3. a section of Fig. 2 on the line 33. the socket being omitted; Fig. 4, a faceand edge view of one of the rings for controlling the gripping levers; and .Fig. 5, a face and edge view of one of the gripping levers.

On the drawings, A is a horizontal cylinder or spindle rotatable axially by applying ower to the spur-gear B carried by the cylinder A; The forward end of the cylinder has secured thereto by the screws a the chuck or holder C' which contains the principal novel features of my invention.

The chuck G has a frame composed of the vertical back and front'walls c and 0 connected together by. the lateral wall 0 or otherwise so as to leavethe space a The back wall 0 is provided with the bolt holes v openings in which the rings D lie parallel with the said walls. Within the space 0" and between the 'ringsD I place five socketgripping levers E, having their inner ends pivotally connected to the rings D by the pins F and their outer ends rovided with the slots G, in which the pins in the walls 0 and c are seated. The levers E are provided with the teeth e, arranged to project into the central openin of the chuckand bite into the surface 0 the coupling J or other article and prevent its rotation relative to the chuck. I have shown the tooth e on each lever between its fulcrum F and the Specification of Letters Patent.

Application filed April 12, 1910. Serial No. 555,081.

Patented May 23, 1911.

point (pin H) of application of power. The 'chuck rotates with the arrow L shown on Fig. 2. I have shown the slots G to include the tangents of a circle somewhat larger than the rings D, but the angle which the slots bear to the radius of the rings may vary considerably. through the slots G in front of the points of tangency, so that any rotative movementof the rin D backwardly relative to the rotation o the chuck, or any checking of the rotation of the rings in their movement with the chuck, as would occur when the rotat-ing socket engages the end of a pipe in the act of screwing the socket on the pipe, would cause the levers E to move slightly to the rear, that is, opposite the direction of the arrow L. This movement of the levers E would cause the teeth 6 to move toward.

the center of the chuck and bite the coupling J harder. It is readily seen that the'action of the coupling on the levers is not such as to cause the levers to slide out on the pins H but always to slide inwardly. The slots G may be variously shaped and inclined and These tangents pass the levers may be variously shaped and the teeth (3 differently located without departinglfroin the spirit of my invention.

represents the presence of a chuck or holder of any kind for the pipe P, having movement toward and from the chuck C by means of the usual rack and pinion connection N. The outer ring D is provided with the handles 0 by which the rings may be rotated.

The operation is as follows: The pipe P is clamped in the chuck M and the coupling to prevent the travel -of the rings D until the teeth e engage the coupling. As 'soon as the teeth e bite the coupling, the resistance offered by the coupling tends to rotatethe rings still further in the back direction causing the teeth to engage the coupling with greater force, the force being greater as the resistance increases. After the coupling is screwed on tight, the coupling is released from the chuck by moving the rings in the direction of the arrow, or if that be impossible, by reversing the rotation of the-chuck.

It is clear that my improved chuck could be used as a stationary holder and to hold solid as well as tubular articles, and articles having various cross-sectional shapes.

I claim I 1. In a chuck, a frame, a ring rotatably connected thereto, gripping levers pivotally connected to the ring, and means providing a slida-ble connection between the frame and the levers, whereby the relative movement of the ring and the frame in one direction causes the gripping part of the levers to move longitudinally and toward the center of the rings. i V

2. In a chuck, a frame, a ring rotatably connected thereto, gripping levers pivotally connected to the ring, and means for causing the levcrsto have a longitudinal and pivotal movement at their outer ends when the ring and the frame have relative rotary movement. I

3. In a chuck, a frame, a ring rotatably connected thereto, gripping levers pivotally connected to the ring, and a pin and slot connection between the frame and each lever.

4. In a chuck, a frame, a ring rotatably connected thereto, gripping levers pivotally connected at one end to the ring, a pivotal pivotal movement at their outer ends when i the ring and the frame have relative rotary movement, and means for rotating the ring.

6. In a' chuck, a frame having connected back and front walls, gripping/levers between the said walls, a rotatable ring carried by the frame at each side of the levers, a pivotal connection between the rings and each lever, a pivotal and slidable connection between each lever and the frame, and gripping means on the inner ends of the levers.

Signed at Steubenville, Ohio, this 9th day of April, A. D. 1910.

GEORGE W. LA V00.

Witnesses:

W. B. HIGGINS, H. E. sCI-IAEFER. 

